I build the CI V interface from the circuit published by QST in 7/92 by KG7SG to use it with my IC-718 and it does not seem to work with HRD. I can not get any readings from my 718. Is there any way I can test with the computer or the 718 if the interface is working properly? Any comments?

I build the CI V interface from the circuit published by QST in 7/92 by KG7SG to use it with my IC-718 and it does not seem to work with HRD. I can not get any readings from my 718. Is there any way I can test with the computer or the 718 if the interface is working properly? Any comments?

Do you have a volt-meter or oscilloscope you can use to verify that the circuit is receiving power from whichever modem control signal (RTS or DTR) you're using as a power supply?

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